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Added dns_message_sectiontotext() and dns_message_totext() functions.

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This commit is contained in:
Michael Sawyer
2000-05-15 17:49:57 +00:00
parent cde7793c7f
commit c95a89b433
2 changed files with 296 additions and 0 deletions
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79
lib/dns/include/dns/message.h
View File

@@ -264,6 +264,85 @@ dns_message_destroy(dns_message_t **msgp);
* '*msgp' == NULL
*/
isc_result_t
dns_message_sectiontotext(dns_message_t *msg, dns_section_t section,
isc_boolean_t comments,
isc_boolean_t omit_final_dot,
isc_boolean_t no_rdata_or_ttl,
isc_buffer_t *target);
/*
* Convert section 'section' of message 'msg' to a cleartext representation
*
* Notes:
* If 'omit_final_dot' is true, then the final '.' in absolute names
* will not be emitted.
* If 'no_rdata_or_tt;' is true, omit rdata and ttl fields.
* If 'comments' is true, lines beginning with ";;" will be emitted
* indicating section name.
*
* Requires:
*
* 'msg' is a valid message.
*
* 'target' is a valid buffer.
*
* 'section' is a valid section label.
*
* Ensures:
*
* If the result is success:
*
* Any bitstring labels are in canonical form.
*
* The used space in 'target' is updated.
*
* Returns:
*
* ISC_R_SUCCESS
* ISC_R_NOSPACE
* ISC_R_NOMORE
*
* Note: On error return, *target may be partially filled with data.
*/
isc_result_t
dns_message_totext(dns_message_t *msg, isc_boolean_t comments,
isc_boolean_t headers, isc_boolean_t omit_final_dot,
isc_boolean_t no_rdata_or_ttl,
isc_buffer_t *target);
/*
* Convert all sections of message 'msg' to a cleartext representation
*
* Notes:
* If 'omit_final_dot' is true, then the final '.' in absolute names
* will not be emitted.
* If 'no_rdata_or_tt;' is true, omit rdata and ttl fields.
* If 'comments' is true, lines beginning with ";;" will be emitted
* indicating section name.
*
* Requires:
*
* 'msg' is a valid message.
*
* 'target' is a valid buffer.
*
* Ensures:
*
* If the result is success:
*
* Any bitstring labels are in canonical form.
*
* The used space in 'target' is updated.
*
* Returns:
*
* ISC_R_SUCCESS
* ISC_R_NOSPACE
* ISC_R_NOMORE
*
* Note: On error return, *target may be partially filled with data.
*/
isc_result_t
dns_message_parse(dns_message_t *msg, isc_buffer_t *source,
isc_boolean_t preserve_order);

217
lib/dns/message.c
View File

@@ -24,6 +24,7 @@
#include <isc/mem.h>
#include <isc/string.h> /* Required for HP/UX (and others?) */
#include <isc/util.h>
#include <isc/buffer.h>
#include <dns/dnssec.h>
#include <dns/keyvalues.h>
@@ -48,6 +49,10 @@
&& ((s) < DNS_SECTION_MAX))
#define VALID_SECTION(s) (((s) >= DNS_SECTION_ANY) \
&& ((s) < DNS_SECTION_MAX))
#define ADD_STRING(b, s) {if (strlen(s) >= \
isc_buffer_availablelength(b)) \
return(ISC_R_NOSPACE); else \
isc_buffer_putstr(b, s);}
/*
* This is the size of each individual scratchpad buffer, and the numbers
@@ -60,6 +65,57 @@
#define RDATALIST_COUNT 8
#define RDATASET_COUNT RDATALIST_COUNT
/*
* Text representation of the different items, for message_totext
* functions.
*/
static char *sectiontext[] = {
"QUESTION",
"ANSWER",
"AUTHORITY",
"ADDITIONAL"
};
static char *opcodetext[] = {
"QUERY",
"IQUERY",
"STATUS",
"RESERVED3",
"NOTIFY",
"UPDATE",
"RESERVED6",
"RESERVED7",
"RESERVED8",
"RESERVED9",
"RESERVED10",
"RESERVED11",
"RESERVED12",
"RESERVED13",
"RESERVED14",
"RESERVED15"
};
static char *rcodetext[] = {
"NOERROR",
"FORMERR",
"SERVFAIL",
"NXDOMAIN",
"NOTIMPL",
"REFUSED",
"YXDOMAIN",
"YXRRSET",
"NXRRSET",
"NOTAUTH",
"NOTZONE",
"RESERVED11",
"RESERVED12",
"RESERVED13",
"RESERVED14",
"RESERVED15",
"BADVERS"
};
/*
* "helper" type, which consists of a block of some type, and is linkable.
* For it to work, sizeof(dns_msgblock_t) must be a multiple of the pointer
@@ -2318,3 +2374,164 @@ dns_message_checksig(dns_message_t *msg, dns_view_t *view) {
return (result);
}
}
isc_result_t
dns_message_sectiontotext(dns_message_t *msg, dns_section_t section,
isc_boolean_t comments,
isc_boolean_t omit_final_dot,
isc_boolean_t no_rdata_or_ttl,
isc_buffer_t *target) {
dns_name_t *name, empty_name;
dns_rdataset_t *rdataset;
isc_result_t result;
REQUIRE(DNS_MESSAGE_VALID(msg));
REQUIRE(target != NULL);
REQUIRE(VALID_SECTION(section));
if (comments) {
ADD_STRING(target, ";; ");
ADD_STRING(target, sectiontext[section]);
ADD_STRING(target, " SECTION:\n");
}
dns_name_init(&empty_name, NULL);
result = dns_message_firstname(msg, section);
if (result != ISC_R_SUCCESS) {
return(result);
}
do {
name = NULL;
dns_message_currentname(msg, section, &name);
for (rdataset = ISC_LIST_HEAD(name->list);
rdataset != NULL;
rdataset = ISC_LIST_NEXT(rdataset, link)) {
result = dns_rdataset_first(rdataset);
if (result != ISC_R_NOMORE) {
if (result != ISC_R_SUCCESS)
return(result);
result = dns_rdataset_totext(rdataset, name,
omit_final_dot,
no_rdata_or_ttl,
target);
if (result != ISC_R_SUCCESS)
return(result);
}
}
result = dns_message_nextname(msg, section);
} while (result == ISC_R_SUCCESS);
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
return(result);
}
isc_result_t
dns_message_totext(dns_message_t *msg, isc_boolean_t comments,
isc_boolean_t headers, isc_boolean_t omit_final_dot,
isc_boolean_t no_rdata_or_ttl,
isc_buffer_t *target) {
char buf[sizeof "1234567890"];
dns_rdataset_t *opt;
dns_name_t *tsigname;
dns_rdataset_t *tsig;
isc_result_t result;
REQUIRE(DNS_MESSAGE_VALID(msg));
REQUIRE(target != NULL);
if (headers) {
ADD_STRING(target, ";; ->>HEADER<<- opcode: ");
ADD_STRING(target, opcodetext[msg->opcode]);
ADD_STRING(target, ", status: ");
ADD_STRING(target, rcodetext[msg->rcode]);
ADD_STRING(target, ", id: ");
sprintf(buf, "%6u", msg->id);
ADD_STRING(target, buf);
ADD_STRING(target, "\n;; flags: ");
if ((msg->flags & DNS_MESSAGEFLAG_QR) != 0)
ADD_STRING(target, "qr ");
if ((msg->flags & DNS_MESSAGEFLAG_AA) != 0)
ADD_STRING(target, "aa ");
if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0)
ADD_STRING(target, "tc ");
if ((msg->flags & DNS_MESSAGEFLAG_RD) != 0)
ADD_STRING(target, "rd ");
if ((msg->flags & DNS_MESSAGEFLAG_RA) != 0)
ADD_STRING(target, "ra ");
if ((msg->flags & DNS_MESSAGEFLAG_AD) != 0)
ADD_STRING(target, "ad ");
if ((msg->flags & DNS_MESSAGEFLAG_CD) != 0)
ADD_STRING(target, "cd ");
ADD_STRING(target, "\n; QUESTION: ");
sprintf(buf, "%3u", msg->counts[DNS_SECTION_QUESTION]);
ADD_STRING(target, buf);
ADD_STRING(target, ", ANSWER: ");
sprintf(buf, "%3u", msg->counts[DNS_SECTION_ANSWER]);
ADD_STRING(target, buf);
ADD_STRING(target, ", AUTHORITY: ");
sprintf(buf, "%3u", msg->counts[DNS_SECTION_AUTHORITY]);
ADD_STRING(target, buf);
ADD_STRING(target, ", ADDITIONAL: ");
sprintf(buf, "%3u", msg->counts[DNS_SECTION_ADDITIONAL]);
ADD_STRING(target, buf);
ADD_STRING(target, "\n");
opt = dns_message_getopt(msg);
if (opt != NULL) {
ADD_STRING(target, ";; EDNS: version: ");
sprintf(buf, "%4u",
(unsigned int)((opt->ttl &
0x00ff0000 >> 16)));
ADD_STRING(target, buf);
ADD_STRING(target, ", udp=");
sprintf(buf, "%7u",
(unsigned int)opt->rdclass);
ADD_STRING(target, buf);
}
ADD_STRING(target, "\n");
tsigname = NULL;
tsig = dns_message_gettsig(msg, &tsigname);
if (tsig != NULL)
ADD_STRING(target, ";; PSEUDOSECTIONS: TSIG\n");
}
if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_QUESTION])) {
ADD_STRING(target, "\n");
result = dns_message_sectiontotext(msg, DNS_SECTION_QUESTION,
comments,
omit_final_dot,
no_rdata_or_ttl,
target);
if (result != ISC_R_SUCCESS)
return (result);
}
if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER])) {
ADD_STRING(target, "\n");
result = dns_message_sectiontotext(msg, DNS_SECTION_ANSWER,
comments,
omit_final_dot,
no_rdata_or_ttl,
target);
if (result != ISC_R_SUCCESS)
return (result);
}
if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_AUTHORITY])) {
ADD_STRING(target, "\n");
result = dns_message_sectiontotext(msg, DNS_SECTION_AUTHORITY,
comments,
omit_final_dot,
no_rdata_or_ttl,
target);
if (result != ISC_R_SUCCESS)
return (result);
}
if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ADDITIONAL])) {
ADD_STRING(target, "\n");
result = dns_message_sectiontotext(msg, DNS_SECTION_ADDITIONAL,
comments,
omit_final_dot,
no_rdata_or_ttl,
target);
if (result != ISC_R_SUCCESS)
return (result);
}
return(ISC_R_SUCCESS);
}